CDB42L50 View Datasheet(PDF) - Cirrus Logic

Part Name

Description

Manufacturer

CDB42L50

Low Voltage, Stereo CODEC with Headphone Amp

Cirrus Logic 

CS42L50

4.1.17 Volume Control: Left Channel (address 04h) & Right Channel (address 05h)

7

VOL7

0

6

VOL6

0

5

VOL5

0

4

VOL4

0

3

VOL3

0

2

VOL2

0

1

VOL1

0

0

VOL0

0

Default = 0 (No attenuation)

Binary Code

00001010

00000111

00000000

11000100

10100110

Decimal Value

12

7

0

-60

-90

Volume Setting

+12 dB

+7 dB

0 dB

-60 dB

-90 dB

Function:

The volume control allows the user to alter the signal level in 1 dB increments from +12 to -96 dB, when

the INDVC bit is disabled. When INDVC is enabled, the volume control can be altered in 1 dB increments

from 0 to -96dB. Volume settings are decoded as shown above, using a 2’s complement code. The vol-

ume changes are implemented as dictated by the Soft and Zero Cross bits in the Analog I/O Control reg-

ister. All volume settings less than -96dB are equivalent to muting the channel.

4.1.18 Left/Right Analog Gain (address 06h)

7

LVOL3

0

6

LVOL2

0

5

LVOL1

0

4

LVOL0

0

3

RVOL3

0

2

RVOL2

0

1

RVOL1

0

0

RVOL0

0

Default = 0 (No gain)

Binary Code

0000

0010

1010

1001

1100

Decimal Value

0

2

6

9

12

Volume Setting

0 dB

+2 dB

+6 dB

+9 dB

+12 dB

Function:

The level of the left and right analog channels can be adjusted in 1dB increments as dictated by the Soft

Ramp and Zero Cross bits from 0 to +12dB when routed through the PGA via the AINMUX bits. Levels

are decoded as shown above. Levels above +12dB are interpreted as +12dB.

22

DS544PP1

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